package cn.edu.swu.cly.auth;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;

import java.io.IOException;
import java.io.OutputStream;

@WebServlet(urlPatterns = "/captcha")
public class CaptchaServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException {
        CaptchaGenerator defaultGenerator = new CaptchaGenerator();
        CaptchaGenerator.CaptchaInfo captcha = defaultGenerator.generate();

        HttpSession session = request.getSession(true);
        session.setAttribute(CAPTCHA_KEY, captcha.gerCode());

        try (OutputStream outputStream = response.getOutputStream()){
            response.setContentType("image/png");
            captcha.writeToStrem();
            outputStream.flush();
        }
    }

}
